Scottish: the plural of 'airt'; directions or compass points.
Regular plural of 'airt' using the -s suffix. Scottish dialect from Old English eorðe (earth), with semantic shift toward 'direction' or 'location.'
Robert Burns used 'airts' in his poetry—when he wrote about 'the four airts,' Scottish readers immediately understood he meant the four cardinal directions, a vocabulary that English speakers had already forgotten.
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